GuinGuin
Banned
What you personally consider what is pretty much irrelevant. MSFS is absolutely first-party. It's published by Microsoft, co-developed by Microsoft Game Studios, and Microsoft directly handles all of its services. It's no less first-party than Bloodborne.
Bloodborne was co-developed by Japan Studio. The team that actually came up with the souls concept and brought in fromsoft to help with demon's Souls and then Bloodborne. Totally different.